Synthesis on Construction Unit Costs Development: Project Summary

摘要

Cost estimating occurs repeatedly throughout all phases of project development. The use of techniques such as historical bid-based or cost-based estimating varies depending on the project development phase and level of project definition and information available. Historical data that support cost estimation also vary based on the specific estimating techniques used. The purpose of this project was to study the use of systematic methodologies to analyze, develop, and apply unit costs for construction and maintenance project cost estimation. The main objective of this project was to explore current industry practices in determining unit costs based on historical bids and/or historical production rates, crew sizes and wages, material costs, and equipment production costs. Information relevant to the unit cost development processes and procedures from the Texas Department of Transportation (TxDOT) was gathered and compared with similar practices at other state highway agencies (SHAs). This comparison forms the basis of potential recommendations for TxDOT's consideration in modifying its approach to construction unit cost development.